fix: format_as("datasets") when no responses

CHANGELOG.md

@@ -23,6 +23,7 @@ These are the section headers that we use:
 ### Fixed
 
 - Replaced `np.float` alias by `float` to avoid `AttributeError` when using `find_label_errors` function with `numpy>=1.24.0` ([#3214](https://github.com/argilla-io/argilla/pull/3214)).
+- Fixed `format_as("datasets")` when no responses or optional respones in `FeedbackRecord`, to set their value to what 🤗 Datasets expects instead of just `None` ([#3224](https://github.com/argilla-io/argilla/pull/3224)).
 
 ### Added
 

src/argilla/client/feedback/dataset.py

@@ -759,13 +759,12 @@ def format_as(self, format: Literal["datasets"]) -> "Dataset":
                     dataset[question.name].append(
                         [
                             {
-                                "user_id": r.user_id,
-                                "value": r.values[question.name].value,
-                                "status": r.status,
+                                "user_id": r.user_id or None,
+                                "value": r.values[question.name].value or None,
+                                "status": r.status or None,
                             }
                             for r in record.responses
                         ]
-                        or None
                     )
                 dataset["metadata"].append(json.dumps(record.metadata) if record.metadata else None)
                 dataset["external_id"].append(record.external_id or None)

tests/client/conftest.py

@@ -428,17 +428,6 @@ def feedback_dataset_records() -> List[FeedbackRecord]:
         ),
         FeedbackRecord(
             fields={"text": "This is a negative example", "label": "negative"},
-            responses=[
-                {
-                    "values": {
-                        "question-1": {"value": "This is a response to question 1"},
-                        "question-2": {"value": 1},
-                        "question-3": {"value": "a"},
-                        "question-4": {"value": ["a", "b"]},
-                    },
-                    "status": "submitted",
-                }
-            ],
             metadata={"another unit": "test"},
             external_id="2",
         ),